Hi,
4.15 was released on Sunday. Fedora will be following the same rebase
procedure that we have in the past: After a few stable releases,
typically 4.15.2 or 4.15.3, F27 will be rebased to 4.15 with F26
rebased shortly there after. I would expect this to happen by the
end of February.
Note this was a tricky kernel release because of all the Spectre/
Meltdown work but that should be settled at this point. More testing
is always appreciated though.
Thanks,
Laura

Hi Andrew,
On 05-02-18 23:02, Andrew Lutomirski wrote:
> On Thu, Feb 1, 2018 at 11:34 AM, Hans de Goede <hdegoede(a)redhat.com> wrote:
>>
>> Hi All,
>>
>> For the "Improved Laptop Battery Life" feature:
>> https://fedoraproject.org/wiki/Changes/ImprovedLaptopBatteryLife
>>
>> I'm working on for Fedora 28 I would like to also try and enable
>> Panel Self Refresh on laptops with Intel graphics, some quick tests
>> have shown this to save another 0.5W (when idle / nothing on the
>> screen changes). This is currently off be default because it is
>> known to cause issues on some devices. So I think we will probably
>> need a white- or black-list. But first we need more data on this.
>>
>> If you can spare 10 minutes, please see my blogpost for how to test
>> this and send me a mail with the info request in the blogpost:
>> https://hansdegoede.livejournal.com/18653.html
>>
>
> I suspect that the results may be odd. After falling into a rabbit
> hole when I tried to do this test, I learned a few things about the
> i915 driver's PSR support:
>
> - Intel doesn't currently have any working CI coverage for PSR.
>
> - There's an Intel person who seems to be actively trying to fix PSR.
>
> - PSR on 4.15 on newish hardware (at least Skylake) is completely broken.
>
> - There are other known bugs.
>
> So I'm not sure that trying to tabulate PSR functionality based on
> panel type seems like it may be the wrong approach.
Thank you for your poking around wrt this. Can you send me an (off-list)
email with the contact info for the Intel person you are talking about,
before spending more time on this I would like to touch base with him/her.
Regards,
Hans

Hi All,
For the "Improved Laptop Battery Life" feature:
https://fedoraproject.org/wiki/Changes/ImprovedLaptopBatteryLife
I'm working on for Fedora 28 I would like to also try and enable
Panel Self Refresh on laptops with Intel graphics, some quick tests
have shown this to save another 0.5W (when idle / nothing on the
screen changes). This is currently off be default because it is
known to cause issues on some devices. So I think we will probably
need a white- or black-list. But first we need more data on this.
If you can spare 10 minutes, please see my blogpost for how to test
this and send me a mail with the info request in the blogpost:
https://hansdegoede.livejournal.com/18653.html
Regards,
Hans